Curvature-related eddy-current losses in laminated axial flux machine cores

Article

Ahfock, Tony L. and Hewitt, Andrew. 2005. "Curvature-related eddy-current losses in laminated axial flux machine cores." IET Electric Power Applications. 152 (5), pp. 1350-1358. https://doi.org/10.1049/ip-erp:20045280
Article Title

Curvature-related eddy-current losses in laminated axial flux machine cores

ERA Journal ID4573
Article CategoryArticle
AuthorsAhfock, Tony L. (Author) and Hewitt, Andrew (Author)
Journal TitleIET Electric Power Applications
Journal Citation152 (5), pp. 1350-1358
Number of Pages41
Year2005
Place of PublicationLondon, UK
ISSN1350-2352
1751-8660
1751-8679
Digital Object Identifier (DOI)https://doi.org/10.1049/ip-erp:20045280
Web Address (URL)http://ieeexplore.ieee.org/servlet/opac?punumber=2194
Abstract

In this paper we present an axiperiodic quasi-static model to evaluate
the magnetic flux density distribution and power loss due to curvature related radial
flux in the laminated core of axial flux machines. It is shown that the relatively low
effective permeability in the radial direction and the shielding effect of induced eddy
currents result in negligible radial flux density compared to the peak flux densities in
the axial and circumferential directions. This justifies the assumption of zero radial
flux which simplifies electromagnetic modelling of axial flux machine cores. The
model predicts that power loss due to curvature related radial flux is insignificant
compared to normal eddy current loss if the core permeability, core conductivity and
number of poles are sufficiently high. A laboratory technique is proposed for the
practical detection of power loss due to curvature related radial flux.

Keywordsaxial flux machines, magnetic flux density distribution, axiperiodic electromagnetic model, eddy currents
ANZSRC Field of Research 2020400899. Electrical engineering not elsewhere classified
Public Notes

File reproduced in accordance with the copyright policy of the publisher/author.

Byline AffiliationsDepartment of Electrical, Electronic and Computer Engineering
SIGMA Energy Solutions, Australia
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